Furnace regulator



July 26, .1927.

J. GOLDBERG Funmca REGULATOR Filed Nov. 22. 1926 .i 'y,l.

51M venfoz Patented July 26, 1927.

UNITED STATES PATENT OFFRCE...

JOHN GOLDBERG, 0F HOPKINS, MINNESOTA.

FURNACE REGULATOR.

Application filed November 22, 1926. Serial No. 149,-955.

' nation and arrangement of parts and in the details of constructionhereinafter described and claimed, it being understood that changes inthe precise embodiment of the invention herein disclosed may be madewithin the scope of what is claimed, without departing from the spiritof the invention.

In the accompanying drawings, the preferred form of the invention hasbeen shown.

In said drawings,

Figure 1 is a side elevation of a furnace having the presentimprovements combined therewith.

Figure 2 is a plan view of the thermostat and aportion of the pipetowhich it is attached. 7

Referring to the figures by characters of reference 1 designates aheating furnace which, in the present instance, is designed as a part ofa steam heating system, one of the steam pipes leading from the furnacebeing indicated at 2. The smoke pipe has been shown at 3. Ordinarily thesmoke pipe is provided at a point between the furnace and the chimneywith a damper located directly thereon. Tn the present instance,however, a flue 4: opens downwardly into the top portion of the smokepipe and eX- tends therefrom to a point below the smoke pipe and closeto the floor where it is eX- tended substantially horizontally and isprovided with an obliquely disposed intake end 5. Hingedly connected tothis end is a plate 6 constituting a damper, the plate normally restingby gravity on the end so as to close it.

A lever 7 which can be adjustably connected to a supporting bracket 8,is located at a point above the furnace and has an operating wire 9 orthe like extending from one end thereof to the damper 6. The other endof the lever 7 is connectedjby a wire 10 or the like to the draft door11 of the furnace which is held normally closed by grav' ity, this doorbeing hinged at its upper end asshown at 12. The connecting wire 10 orthe like is mounted on guide sheaves 13 and 1 1 and "it is preferredthat the flexible 0on nection 10 be provided with a screw threaded stem15 on which a. sleeve 16 is adjustably mounted; This sleeve has terminalcollars 17 and 18 and is located close to the pipe 2. The damper 6 anddoor 11 are substantially balanced so as to remain in any given positionduring the lost motion of the thermostat A thermostat indicatedgenerally at 19 is 7 attached at one end to the pipe 2, preferably bymeans of U-bolts 20 which straddle the pipe and engage the thermostat,these bolts serving to hold the thermostat pressed close to the pipe.The free end portion of the thermostat has an car 21 in which the sleeve16 is loosely mounted. Said thermostat is preferably formed of twolayers of metal having different coefficients of expansion. Thus whenthe thermostat is unheated or only slightly heated the damper 6 will 1remain closed while the door 11 will be held open as shown in Figure 1.However when the temperature of the fluid in the pipe 2 is raised to apredetermined degree, the thermostat will be caused to bow downwardlywith the result that the ear 21 will come against and shift the collar18. Consequently a pull will be exerted through the connection 10 uponone arm of the lever 7, thereby allowing the door 11 to close while atthe same time said lever 7 will pull on the connection 9 so as to openthe damper 6.

Thus the fire will be checked and as the temperature of the heatingfluid falls to a predetermined degree the thermostat will graduallystraighten out, thereby allowing the damper 6 and the door 10 to returnto their normal positions as shown in Figure 1. By having the ear 21between spaced collars 17 and 18, a certain movement of the thermostatis permitted without actuation of the damper and door. The sleeve isadjustably mounted so as to advance or retard the actuation of thedamper and door and the lever 7 is adj ustably mounted so as to regulatethe extent of movement of the damper and door when actuated.

WVhile the thermostat has been shown attached to a pipe designedprimarily for conducting steam, it is to be understood that it can alsobe attached to a hot water pipe or to a hot air pipe, this depending onthe type of furnace used.

By arranging the damper 6 close to the floor, the checking of thefurnace will result in the withdrawal of the cold impure air close tothe floor and thus more helpful conditions will result than where thedamper is located as ordinarily.

What is claimed is: 1. The combination with a furnace having a draftdoor and a damper adapted to be closed by gravity, and a pipe forconducting heated fluid from the furnace, of an adjustably mountedlever, a connection between the lever and the damper, a connection,including a screw threaded portion, between the lever and the door, athermostat attached to and adapted to be actuated by the heat of thecontents of the pipe, and an adjustable lost motion connection betweenthe thermostat and the threaded portion.

2. The combination with a heating furnace including a damper adapted tobe closed by gravity and a pipe for conducting heated fluid from thefurnace, of a lever adjustably mounted, a connection between the leverand the damper, a threaded stem connected to the lever, a memberadjustably mounted on the stem and having spaced collars, a thermostatsecured to the pipe and adapted to be actuated by the heat of thecontents of the pipe, and means carried by the thermostat for slidablyengaging said member between the collars.

stat and the said door and lover connection.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature.

JOHN GOLDBERG.

